KR19980075378A - Washing machine with centrifugal pump - Google Patents

Abstract

The present invention discloses a washing machine that can circulate washing water to disperse it in laundry, as well as improve washing power by supplying bubbles in the spin tub.

The washing machine has a centrifugal pump. The centrifugal pump has a first housing, a second housing fixedly coupled to the first housing, an impeller embedded in the first housing for circulating the wash water to the spray nozzle or for flowing to an outer tub, the forward and reverse rotation And a rotor, a drive shaft fixedly inserted into a central portion of the rotor, a drive shaft as the rotor rotates, and a first solenoid valve assembly for supplying air to the impeller. The washing machine creates turbulence in the spin tub to prevent tangling in the center of the spin tub in the laundry. Bubbles supplied into the spin tub by the centrifugal pump burst in the spin tub naturally or by collision with water flow formed by the pulsator, thereby impacting the laundry contained in the spin tub to improve washing power. Of course, the detergent is easily dissolved.

Description

Washing machine with centrifugal pump

The present invention relates to a washing machine, and more particularly, to a washing machine having a centrifugal pump that can improve washing power by circulating the washing water in the washing process and spraying the laundry, as well as supplying bubbles in the spin tub.

Generally, a washing machine is classified into a pulsator type washing machine, an agitator type washing machine, and a drum type washing machine according to the washing method.

Among the washing machines, a pulsator-type washing machine is rotatably mounted at the lower end of the spin tub to generate water flow in the spin tub, and includes a pulsator. In the pulsator-type washing machine, the pulsator is driven by a motor to generate a swirl flow in the spin tub, and the laundry is washed by friction between the swirl flow and the laundry. The pulsator type washing machine is widely used for home use.

However, such a pulsator type washing machine has a disadvantage of low washing efficiency. For example, if the rotation speed of the pulsator is high, the centrifugal force of the water flow becomes strong, and the laundry strongly hits the side wall of the spin tub, which causes damage to the laundry. On the contrary, when the rotation speed of the pulsator is low, the laundry is not washed cleanly.

In order to overcome this problem, a washing machine having a generator for improving the washing power has been recently proposed, by generating bubbles in the spin tub during the washing process. US Patent No. 5,307, 649 discloses a washing machine equipped with such a bubble generating device.

5 shows a washing machine 400 granted to Lim et al.

As shown in FIG. 5, the washing machine 400 includes a housing 10 and an outer tub 12 fixedly mounted in the housing 10 to accommodate washing water or detergent solution. Connected to the bottom of the outer tub 12 is a drain pipe 14, which drains the wash water from the outer tub 12 during washing, dewatering, and rinsing operations. The washing machine 400 further comprises an electric motor 18 having a drive shaft 16 and a clutch assembly 24 having first and second driven shafts 20, 22.

The electric motor 18 and the clutch assembly 24 are fixed to the outer tub 12 by fixing means such as welding or screwing. The drive shaft 16 is operatively connected to the first and second driven shafts 20, 22 by a belt transmission mechanism 26. The clutch assembly 24 allows the driving force generated by the electric motor 18 to be selectively transmitted to the first and second driven shafts 20, 22.

The first driven shaft 20 is connected to the spin tub 28. A plurality of water outlets 30 are formed on sidewalls of the spin tub 28 to allow the washing water to flow in or out, and the bottom wall of the bubble tub 32 allows bubbles to flow into the spin tub 28. Is formed. The second driven shaft 22 is formed with a plurality of through holes (not shown) of the pulsator 34 mounted to the lower portion of the spin tub 28.

The bubble generator 35 is mounted on the bottom wall of the outer tub 12. The bubble generator 35 communicates with the air pump 38 through an air conduit 36. The air pump 38 generates pressure air under precise control of the controller 40.

The conventional washing machine 400 having such a configuration operates as follows.

In the washing mode, when the water level in the spin tub 28 reaches a predetermined position, a microcomputer (not shown) transmits an operation signal to the electric motor 18, whereby the electric motor 18 is driven. . The driving force of the electric motor 18 is transmitted to the second driven shaft 22 via the drive shaft 16, the belt transmission 16, and the clutch assembly 24 of the electric motor 18. The pulsator 34 connected to the second driven shaft 2 is left and right.

While the washing mode is in progress, the microcomputer transmits an operation signal to the control device 40 to operate the air pump 38. The air derived by the air pump 38 enters the outer tub 12 through the bubble generator 35 mounted on the bottom wall of the air conduit 36 and the outer tub 12. The air introduced into the outer tub 12 is mixed with the wash water stored in the outer tub 12 to form an air bubble.

The bubbles are introduced into the spin tub 28 through a bubble passage 32 formed at the bottom of the spin tub 28 and a plurality of through holes formed in the pulsator 34. Subsequently, the bubbles burst in the spin tub 28 either naturally or by collision with the water flow generated by the pulsator, thereby impacting the laundry contained in the spin tub 28 to improve the washing power. Of course, the detergent is easily dissolved.

However, since the washing machine 400 is washed only by the water flow generated by the rotation of the pulsator 34, it requires a lot of washing time to improve the washing efficiency. Otherwise, the pulsator 34 must be rotated quickly, thereby overloading the electric motor 18.

In addition, since the air pump 38 for generating air, the control device 40 for controlling the air pump 38, and the bubble generating device 35 are separate parts, these are respectively washed. Separate fixing devices are required for mounting, thus increasing the number of parts and increasing the assembly process of the washing machine 400.

The present invention is to solve the problems of the prior art as described above, the present invention is a centrifugal pump that can improve the washing power by circulating the washing water in the washing administration process to spray the laundry as well as supplying bubbles in the spin tub An object of the present invention is to provide a water spray washer provided with.

Another object of the present invention is to provide a washing machine having a centrifugal pump in which an air generating means and a bubble generating means are integrated.

1 is a cross-sectional view showing the structure of a washing machine according to an embodiment of the present invention.

2 is an enlarged view of the centrifugal pump shown in FIG.

3 is a cross-sectional view showing a flow path of a fluid.

4 is an enlarged view of the solenoid valve assembly shown in FIG.

5 is a cross-sectional view showing the structure of a conventional washing machine.

Explanation of symbols on the main parts of the drawings

10 housing 12 outer tub

14 drain pipe 16 drive shaft

18: electric motor 20: first driven shaft

22: second driven shaft 24: clutch assembly

28: spin tub 30: water passage

32: bubble passage 34: pulsator

35 bubble generator 36 air conduit

38: air pump 40: control device

@@: Belt Drive Mechanism 100: Washing Machine

110: cabinet 120: outer tub

122: first fluid tub 124: second fluid tub

130: pulsator 132: Center Hool

134: first blade 136: boring hole

140: rotating plate 142: laundry storage

144 guide 146 guide strip

150: spin tub 152: water outlet

160: motor 162: motor shaft

164: first pulley 166: second pulley

170: gear mechanism 172: spin turbine drive shaft

174: pulsator drive shaft 180: injection nozzle

182: circulating tube 184: first fluid tube

186: second fluid pipe 200: pump portion

210: first housing 212: inlet

214: first duct 216: second duct

218: 2-way valve 220: hinge shaft

230: impeller 232: inlet

234 Hub 236 Fluid Channel

238: space portion 240: cover

250: second housing 252: stator

254: rotor 260: drive shaft

262: fluid passage 264: recess

266: check valve 268: air inlet

270: first solenoid valve assembly 280: bearing holder

282: Bearing 284: Screw Hool

300: casing 305: opening

310: screw portion 320: bobbin

330: first solenoid 335: first gap

340: first movable core 350: support member

360: working rod 365: second gap

370: spool valve 400: conventional washing machine

500: second solenoid assembly 505: hollow cylinder

510: second solenoid 520: second movable core

530: piston valve 540: second spring

550 valve seat 560 drain pipe

Washing machine according to an embodiment of the present invention to achieve this object is a cabinet; An outer tub disposed in the cabinet and containing water to be supplied; A spin tub embedded in the outer tub and having a plurality of water passages formed on sidewalls thereof; A pulsator mounted to the bottom wall of the spin tub to generate water flow in the spin tub; A motor generating a rotational force; Second means for rotating the spin tub; Second means for rotating the pulsator; And a third means for circulating the washing water with the spray nozzle provided on the upper portion of the outer tub, generating bubbles in the washing water, and supplying the washing water including the bubbles to the outer tub.

According to a preferred embodiment of the present invention, the bottom wall of the outer tub is formed with a first fluid port for discharging the wash water to the third means and a second fluid port for receiving the wash water from the third means.

The first means includes a rotating plate fixed to a lower surface of the spin tub and a spin tub driving shaft which rotates by receiving rotational force from the motor, and the spin tub driving shaft is fixedly coupled to a central portion of the rotating plate.

The second means includes a pulsator drive shaft for receiving a rotational force from the motor to rotate.

The pulsator has a plurality of first blades for generating water flow, a center hole is formed at the center thereof, and each of the first blades has at least one perforated hole at a predetermined position adjacent to the center of the pulsator. Is formed.

The third means may include a first housing, a second housing fixedly coupled to the first housing, fourth means for circulating the washing water through the spray nozzle or flowing the second fluid port, and the fourth means. And fifth means for rotating air, and sixth means for supplying air to the fourth means.

The fourth means includes an impeller embedded in the first housing. The impeller is a suction port for sucking the wash water through the water inlet of the first housing, a plurality of second blades to impart the sucked wash water to the first duct of the housing, or optionally, to the second duct And a hub fixedly coupled to the fifth means to receive rotational force from the fifth means.

The fifth means may include a stator embedded in the second housing and receiving an electric signal from a microcomputer, a rotor surrounded by the stator, and rotating forward and reverse at a predetermined time period as an electric signal is applied to the stator, in a central portion of the rotor. A drive shaft fixedly inserted and rotating together as the rotor rotates.

The sixth means includes a solenoid valve assembly and a fluid passageway longitudinally through the drive shaft.

The washing machine according to the present invention having the above configuration operates as follows.

In the washing stroke, when the water level in the spin tub reaches a predetermined position, the microcomputer transmits an operation signal to the motor, whereby the motor is driven. The driving force of the motor is transmitted to the pulsator drive shaft, whereby the pulsator connected to the pulsator drive shaft inverts from side to side.

At the same time the microcomputer applies an electrical signal to the first solenoid valve assembly and the stator. Thus, the rotor repeats rotation and inversion. The rotational force of the rotor is transmitted to the impeller to rotate and invert the impeller, whereby washing water flows into the suction port of the impeller.

At the same time, an intermittent electrical signal is applied to the first solenoid valve assembly, so that atmospheric air is intermittently introduced into the impeller through the first solenoid valve assembly.

At this time, the air introduced into the impeller is mixed with the wash water to form bubbles, thus, the wash water containing the bubble is delivered to the first duct or, optionally, the second duct.

The microcomputer controls the first solenoid valve assembly in accordance with a predetermined algorithm so that an appropriate amount of bubbles can be formed, thereby adjusting the inflow of air.

On the other hand, when the impeller is rotated forward, the washing water containing the bubble is guided to the second duct through the second blade of the impeller. The guided wash water is introduced into the spin tub through the center hool formed in the center of the pulsator and the perforated hool formed in the first blade. In this way, since the washing water containing bubbles is supplied to the spin tub through the center of the pulsator during the washing process, the laundry can be prevented from getting tangled at the center of the spin tub.

On the other hand, when the impeller is inverted, the wash water containing the bubbles flows to the first duct. At this time, the wash water is circulated to the injection nozzle formed on the upper portion of the outer tub through the circulation tube. The circulated washing water is sprayed on the laundry embedded in the spin tub to improve the washing effect.

As described above, since the washing machine according to the present invention supplies an appropriate amount of air bubbles to the spin tub through the center of the pulsator, it forms turbulence in the spin tub to prevent laundry from getting tangled in the center of the spin tub. Do it.

In addition, since the pump unit not only circulates the washing water but also generates bubbles, a separate bubble generator and a component for mounting the same to the washing machine are not required, and the assembly process of the washing machine is simplified.

In addition, bubbles supplied into the spin tub may burst naturally in the spin tub by a collision with water flow formed by the pulsator 34, thereby impacting the laundry contained in the spin tub to improve washing power. Of course, the detergent dissolves easily.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention;

1 is a cross-sectional view of the washing machine 100 according to an embodiment of the present invention.

As shown in FIG. 1, the washing machine 100 of the present invention includes a cabinet 110. In the cabinet 110, an outer tub 120 containing water to be supplied and a spin tub 150 embedded in the outer tub 120 and having a plurality of water passages 152 formed on a sidewall thereof are disposed. First and second fluid ports 122 and 124 are formed on the bottom wall of the outer tub 120. In addition, a pulsator 130 generated in the spin tub 150 is mounted on the bottom wall of the spin tub 150. The rotating plate 140 for rotating the spin tub 150 is fixed to the lower surface of the spin tub 150.

The lower surface of the rotating plate 140 in close contact with the bottom wall of the outer tub 120 to accommodate the washing water flowing through the second fluid port 124 without leaking washing unit 142 ) Is formed and a guide hole 144 for guiding the washing water to the pulsator 130 is formed at the center of the rotating plate 140. The wash water introduced through the guide hole 144 is guided to the center of the pulsator 130 by the guide strip 146 formed on the upper surface of the rotating plate 140.

The pulsator 130 has a plurality of first blades 134 for generating water flow. A center hool 132 is formed at the center of the pulsator 130, and each of the first blades 134 has at least one perforated hole 136 at a predetermined position adjacent to the center of the pulsator 130. Formed. Therefore, the wash water introduced through the guide hose 144 of the rotating plate 140 is introduced into the spin tub 150 through the center hool 132 and the perforated hole 136.

A motor 160 generating a driving force and having a motor shaft 162 is installed below the cabinet 110. A pump for circulating the washing water to the spray nozzle 180 installed in the upper portion of the outer tub 120 at the lower position of the cabinet 110 opposite to the motor 160 to supply bubbles to the outer tub 120. The unit 200 is disposed. The pump unit 200 communicates with the injection nozzle 180 through the circulation tube 182, communicates with the first fluid port 122 through the first fluid pipe 184, and the second fluid pipe ( In communication with the second fluid port 124 through 186. The pump unit 200 includes a centrifugal pump, the configuration of which will be described in more detail with reference to FIG.

The end of the motor shaft 162 is provided with a first pulley 164. The first pulley 164 is connected to the second pulley 166 coupled to the first end of the pulsator drive shaft 174 by the belt 165, so that the rotational force of the motor 160 is the pulsator 130 Is delivered). A gear mechanism 170 is provided above the second pulley 166 to selectively transmit the rotational force of the motor 160 to the spin tub drive shaft 172 or the pulsator drive shaft 174.

The pulsator drive shaft 174 is rotatably embedded in the spin tub drive shaft 172. The second end of the pulsator drive shaft 174 is fixedly coupled to the center of the bottom surface of the pulsator 130, so that the pulsator 140 also rotates as the pulsator drive shaft 174 rotates. . In addition, the spin tub drive shaft 172 is fixedly inserted into the central hole of the rotating plate 140. Accordingly, as the spin tub drive shaft 172 rotates, the rotating plate 140 rotates together to rotate the spin tub 150.

Referring to FIG. 2, the pump unit 200 may be formed by a first housing 210, a cover 240 fixedly attached to one end of the first housing 210, and an adhesive method such as welding or fusion. The second housing 250 is coupled to the cover 240.

The first housing 210 is provided with an inlet 212 connected to the first fluid port 122 of the outer tub 120 through the first fluid pipe 184 to receive the wash water. Referring to FIG. 3, the outer tub 120 is connected to the first duct 214 and the second fluid tube at a lower portion of the first housing 210 through the circulation tube 182. A second duct 216 is formed, which is connected to the second fluid port 124 of. Between the first duct 214 and the second duct 216 is pivoted around the hinge axis 220 to wash the water to the first duct 214, or optionally, the second duct 216. A guiding two-way valve 218 is provided.

Referring back to FIG. 2, an impeller 230 is embedded in the first housing 210. The impeller 230 is a suction port 232 for sucking the wash water through the water inlet 212 of the first housing 210, the first and second duct 214 by applying a centrifugal force to the sucked wash water , A plurality of second blades 233 to be transmitted to 216, and a hub 234 fixedly coupled to the drive shaft 260 to receive rotational force from the drive shaft 260. The hub 234 is formed with a plurality of fluid channels 236 in communication with the inlet 232. In addition, a space 238 is formed inside the hub 234.

The second housing 250 includes a stator 252 that receives an electric signal from a microcomputer (not shown) and a rotor that is surrounded by the stator 252 and rotates when an electric signal is applied to the stator 252. rotor 254 is incorporated. The drive shaft 260 is fixedly inserted into the center of the rotor 524 to rotate together as the rotor 254 rotates.

The drive shaft 260 extends through the center of the rotor 254, the first end of which is fixedly inserted into the hub 234, and the second end of which is inserted into the distal end of the second housing 250. Is rotatably inserted into the bearing 282 of the mounted bearing holder 280. The drive shaft 260 also has a fluid passage 262 that is perforated in the longitudinal direction. An air inlet 268 through which air flows is formed at a first end of the fluid passage 262, and a recess 264 in which a check valve 266 is embedded is formed at the second end of the fluid passage 262. The fluid passage 262 is tapered toward the first end of the fluid passage 262 so as to reduce the speed of the air introduced during operation of the pump 200 to reduce the noise caused by the collision of air and wash water. It is.

The center of the bearing holder 280 is formed with a screw hose 284 for mounting the first solenoid valve assembly 270. Referring to FIG. 4, the first solenoid valve assembly 270 includes a casing 300 having an opening 305 formed at one end thereof for receiving air in the atmosphere and a screw hole 284 of the bearing holder 280. The screw unit 310 is screwed into, and the valve portion 380 is formed therein in communication with the fluid passage (262). The valve chamber 380 has a built-in spool valve 370 that periodically blocks air flowing into the valve chamber 380 when the first solenoid valve assembly 270 is operated.

The hollow bobbin 320 is installed in the casing 300. The first solenoid 330 is wound around the outer circumference of the bobbin 320. In the bobbin 320, between the first movable core 340, the first movable core 340, and the support member 350, which reciprocate as an intermittent electric signal is applied to the first solenoid 330. A first spring 355 disposed in the first spring 355 to elastically support the first movable core 340, and coupled to the first movable core 340 to reciprocate with the first movable core 340. Rod 360 is disposed.

The first end of the actuating rod 360 is coupled to the first movable core 340. The second end of the operation rod 360 extends through the support member 350 to the valve chamber 380 and is coupled to the spool valve 370.

In addition, between the outer wall of the first movable core 340 and the inner wall of the hollow bobbin 320 so that air in the air can flow into the pump unit 200 through the opening 305 of the casing 300. A first gap 335 is formed therein, and a second gap 365 is formed between the inner wall of the support member 350 and the outer wall of the operation rod 360.

On the other hand, as shown in Figure 3, a predetermined point of the washing water discharge pipe 560 is provided with a second solenoid valve assembly 500 for opening / closing the discharge pipe 560 in accordance with an electrical signal applied from a microcomputer. .

The second solenoid valve assembly 500 includes a hollow cylinder 505 and a second solenoid 510 wound on an outer wall of the hollow cylinder 505. A second movable core 520 having a piston valve 530 integrally formed in the cylinder, and an upper portion of the second movable core 520 are disposed so that the piston valve 530 is provided on the valve seat 550. It is disposed on the second spring 540 that applies a downward biasing force to the movable core 520 to be seated.

Washing machine 400 according to the present invention having such a configuration operates as follows. At the washing stroke, when the water level in the spin tub 150 reaches a predetermined position, the microcomputer transmits an operation signal to the motor 160, and the motor 160 is driven accordingly. The driving force of the motor 160 is transmitted to the pulsator drive shaft 174 via the motor shaft 162, the first pulley 164, the belt 165, the second pulley 166, and the gear mechanism 170. Accordingly, the pulsator 130 connected to the pulsator drive shaft 174 is inverted from side to side.

At the same time, the microcomputer applies an electrical signal to the first solenoid 330 of the first solenoid valve assembly 270 and the stator 252 of the pump unit 200.

As the electrical signal is applied to the stator 252, the rotor 254 surrounded by the stator is rotated and inverted at a predetermined period previously input to the microcomputer. Rotation force of the rotor 254 is transmitted to the impeller 230 to rotate and reverse the impeller 230, accordingly, the wash water in the outer tub 120, the first fluid port of the outer tub 120 The inlet 232 of the impeller 230 is introduced through the inlet portion 212 of the 122, the first fluid pipe 184, and the first housing 210. A predetermined amount of the washing water introduced into the suction port 232 flows into the space part 238 through the fluid channel 236 formed in the hub 234, and the remaining washing water is the second blade of the impeller 230. 233 is delivered to the first duct 214, or optionally the second duct 216. At this time, the pressure in the space portion 238 is enhanced to below atmospheric pressure due to the rotation of the second blade 233.

At the same time as an intermittent electrical signal is applied to the first solenoid 330, the first movable core 340 reciprocates in the bobbin 320, and thus, the second end of the actuating rod 360. The spool valve 370 coupled to is intermittently opened / closed. Therefore, air in the atmosphere is formed between the opening 305, the inner wall of the bobbin 320 and the outer wall of the movable core 340, and the inner wall of the support member 350 and the operation. It intermittently flows into the valve chamber 380 through the second gap 365 formed between the outer walls of the rod 360.

At this time, since the pressure in the space portion 238 is lowered below the atmospheric pressure, the air guided to the valve chamber 380 is through the fluid passage 262 of the drive shaft 260, the recess ( While pushing the check valve 266 seated on the 264, it is introduced into the space 238. Air introduced into the space 238 is mixed with the wash water in the space 238 to wash water containing bubbles into the first duct 214 or, optionally, the second duct 216. Delivered.

The microcomputer controls the first solenoid valve assembly 270 according to a preset algorithm to form an appropriate amount of bubbles, thereby adjusting the inflow of air.

On the other hand, as shown in Figure 3, when the impeller 230 is rotated forward, the washing water containing the bubble is the second duct 216 through the second blade 233 of the impeller 230 Flows into. In this case, the two-way valve 218 opens the second duct 216 and closes the first duct 214 by the pressure of the washing water flowing into the second duct 216. Therefore, the wash water is guide hoses of the rotating plate 140 through the second fluid pipe 186, the second duct 214 of the outer tub 120, and the washing water receiving unit 142 of the rotating plate 140 ( 144).

The guided wash water is introduced into the spin tub 150 through the center hole 132 formed at the center of the pulsator 130 and the funnel hole 136 formed at the first blade 134. In this manner, since washing water containing bubbles is supplied to the spin tub 150 through the center of the pulsator 130 during the washing process, turbulence is formed in the spin tub 150, and thus laundry is formed. It is possible to prevent tangling at the center of the spin tub 150. In addition, bubbles contained in the laundry part impact the laundry contained in the spin tub 150 by bursting in the spin tub 150 naturally or by collision with the water flow generated by the pulsator 130. Add to improve the washing power as well as dissolve the detergent easily.

On the other hand, when the impeller 230 is reversed, the washing water containing the bubble flows to the first duct 214 through the second blade 233 of the impeller 230. In this case, the two-way valve 218 opens the first duct 214 and closes the second duct 216 by the pressure of the washing water flowing into the first duct 214. Thus, the wash water is circulated through the circulation tube 182 to the injection nozzle 180 formed on the outer tub 120. The circulated washing water is sprayed on the laundry embedded in the spin tub 150 to improve the washing effect.

During the dehydration stroke, the rotational force of the motor 160 is transmitted to the spin tubular drive shaft 172 by the gear mechanism 170, and thus, the rotary plate 140 fixedly coupled to the spin tubular drive shaft 172. This rotation rotates the spin tub 150. As the spin tub 150 rotates, the laundry loaded into the spin tub 150 is forced to be in close contact with the sidewall of the spin tub 150 by the action of centrifugal force, and thus the laundry is included. Washing water is discharged through the water outlet 152 formed on the side wall of the spin tub 150.

At the same time, the microcomputer applies an electrical signal to the stator 252 so that the rotor 254 can be reversed. As the impeller 230 reverses, the wash water discharged from the laundry flows to the first duct 214 through the second blade 233 of the impeller 230.

At this time, the microcomputer applies an electrical signal to the second solenoid valve assembly 500, so that the second movable core 520 seated on the valve seat 550 is biased by the second spring 540. Overcoming it will move upward. The wash water passing through the first duct 214 is discharged to the outside of the washing machine 400 through the drain pipe 560.

As described above, since the washing machine according to the present invention supplies an appropriate amount of air bubbles into the spin tub through the center of the pulsator, it forms turbulence in the spin tub so that laundry is entangled in the center of the spin tub. Prevent it.

In addition, since the pump unit not only circulates the washing water but also generates bubbles, a separate bubble generator and a component for mounting the same to the washing machine are not necessary, thus simplifying the assembly process of the washing machine.

In addition, the bubbles supplied into the spin tub burst in the spin tub 28 by collision with water generated by the pulsator naturally or by impacting the laundry contained in the spin tub, thereby improving washing power. Of course, the detergent is easily dissolved.

Claims (22)

Cabinet; An outer tub disposed in the cabinet and containing water to be supplied; A spin tub embedded in the outer tub and having a plurality of water passages formed on sidewalls thereof; A pulsator mounted to the bottom wall of the spin tub to generate water flow in the spin tub; A motor generating a rotational force; First means for rotating the spin tub; Second means for rotating the pulsator (34); And And a third means for circulating the washing water to an injection nozzle provided above the outer tub, generating bubbles in the washing water, and supplying the washing water including the bubbles to the outer tub. The bottom wall of the outer tub is formed with a first fluid port for discharging the wash water to the third means and a second fluid port for receiving the wash water from the third means. washer. According to claim 2, wherein the first means includes a rotating plate fixed to the lower surface of the spin tub and a spin tub drive shaft for rotating the rotational force received from the motor, the spin tub drive shaft is fixedly coupled to the center of the rotating plate Washing machine characterized in that. The pulsator drive shaft of claim 3, wherein the second means includes a pulsator drive shaft configured to rotate by receiving rotational force from the motor, wherein the pulsator drive shaft is rotatably embedded in the spin tub drive shaft, and a distal end portion of the bottom surface of the pulsator is provided. Washing machine, characterized in that fixed to. 4. The pulsator (34) according to claim 3, wherein the pulsator (34) is provided with a plurality of first blades for generating water flow, with a center hool formed at the center of the pulsator (34). Washing machine, characterized in that at least one perforated hole is formed at a predetermined position adjacent to the center of the. 6. The wash water storage unit according to claim 5, wherein the rotating plate is in close contact with the bottom wall of the outer tub 12 so as to receive the wash water flowing through the second fluid port from the third means without leakage. And a guide strip for guiding the wash water, and a guide strip for guiding the wash water to the center and perforated holes of the pulsator (34). 3. The apparatus of claim 2, wherein the third means comprises: a first housing, a second housing fixedly coupled to the first housing, and a fourth for circulating the washing water into the spray nozzle or flowing into the second fluid port. Means, a fifth means for rotating said fourth means, and a sixth means for supplying air to said fourth means. The method of claim 7, wherein the first housing is connected to the first fluid port of the outer tub 12 through a first fluid pipe, an inlet for storing wash water, and a first nozzle connected to the injection nozzle through a circulation tube. And a second duct connected to the second fluid port of the outer tub (12) via a first duct and a second fluid tube. The washing machine according to claim 8, wherein a two-way valve is provided between the first duct and the second duct to selectively open / close the first and second ducts according to the discharge direction of the wash water. . The method of claim 8, wherein the fourth means comprises an impeller embedded in the first housing, the impeller is a suction port for sucking the wash water through the water inlet of the first housing, applying the centrifugal force to the sucked wash water And a plurality of second blades for transmitting to the first duct, or optionally, the second duct, and a hub fixedly coupled to the fifth means to receive rotational force from the fifth means. Washing machine. The washing machine according to claim 10, wherein a space is formed in the hub by having a plurality of fluid channels communicating with the suction port. The stator of claim 10, further comprising: a stator embedded in the second housing and receiving an electric signal from a microcomputer, a rotor surrounded by the stator, and rotating forward and reverse at predetermined time intervals as the electric signal is applied to the stator, and a central portion of the rotor. Washing machine comprising a drive shaft fixedly inserted into the rotating shaft as the rotor rotates. A first end of the drive shaft is fixedly inserted into the hub of the impeller, a second end opposite the first end is rotatably inserted into a bearing of the bearing holder inserted into the distal end of the second housing, and Washing machine, characterized in that the screw hole is formed in the center of the bearing holder. 14. The washing machine of claim 13, wherein said sixth means comprises a fluid passageway longitudinally through said first solenoid valve assembly and said drive shaft. 15. The apparatus of claim 14, wherein an air inlet through which air is introduced from the first solenoid valve assembly is formed at a first end of the fluid passage, and a recess in which a check valve is built is formed at a second end opposite to the first end. Washing machine characterized in that. 16. The washing machine according to claim 15, wherein the fluid passage is tapered toward the first end of the fluid passage. 15. The apparatus of claim 14, wherein the first solenoid valve assembly includes a casing having an opening for receiving air in the atmosphere, a screw having a valve chamber screwed into a screw hole of the bearing holder and in communication with the fluid passage therein. A spool valve intermittently intermittent flowing into the valve chamber, a hollow bobbin disposed in the casing, a solenoid wound around the outer periphery of the bobbin, and disposed within the bobbin and reciprocated as an electric signal is intermittently applied to the solenoid. A movable movable core, a support member for supporting the movable core, a spring disposed between the movable core and the support member to elastically support the movable core, and the spool to allow air to enter the valve chamber And an actuating rod for intermittently pushing the valve. It operated laundry. 18. The method of claim 17, wherein the first end of the actuating rod is fixedly coupled to the movable core, and the second end of the actuating rod opposite to the first end extends to the valve chamber to engage with the spool valve. The washing machine characterized by. 18. The actuating rod of claim 17, wherein a first gap is formed between the outer wall of the movable core and the inner wall of the hollow bobbin, and a second gap is formed between the inner wall of the support member and the outer wall of the actuating rod. The second gap is formed between the outer walls of the washing machine, characterized in that the air introduced through the opening of the tasing is introduced into the valve chamber through the first and second gaps. The second solenoid of claim 1, wherein the second duct of the first housing is connected to a washing water discharge pipe, and a second solenoid which opens / closes the discharge pipe according to an electric signal applied from the microcomputer at a predetermined point of the washing water discharge pipe. Washing machine, characterized in that the valve assembly is provided. The washing machine according to claim 1, wherein said third means comprises a centrifugal pump. Cabinet; An outer tub disposed in the cabinet and containing water to be supplied; A spin tub embedded in the outer tub 12 and having a plurality of water passages formed on sidewalls thereof; A pulsator mounted to the bottom wall of the spin tub to generate water flow in the spin tub; A motor generating a rotational force; A spin tub driving shaft configured to include a rotating plate fixed to a lower surface of the spin tub and a spin tub driving shaft that receives rotational force from the motor, wherein the spin tub driving shaft is fixedly coupled to a central portion of the rotating plate; The pulsator drive shaft is rotated by receiving the rotational force from the motor and is rotatably embedded in the spin tub drive shaft and the front end is fixedly coupled to the center of the bottom surface of the pulsator; And It is provided with a centrifugal pump for circulating the washing water to the injection nozzle installed in the upper portion of the outer tub 12, generates bubbles in the washing water, and supplies the washing water containing the bubbles to the outer tub, The bottom wall of the outer tub 12 is formed with a first fluid port for discharging the wash water to the centrifugal pump and a second fluid port for receiving the wash water from the centrifugal pump, the pulsator to generate water flow It has a plurality of first blades for the center, the center of the pulsator 34 is formed with a center hole and each of the first blades at least one perforated hole in a predetermined position adjacent to the center of the pulsator 34 Is formed, the rotating plate is a washing machine accommodating portion in contact with the bottom wall of the outer tub 12 so as to accommodate the washing water flowing through the second fluid port from the centrifugal pump without leaking, A guide hool for guiding the wash water, and a guide stream for guiding the wash water to the center hool and the perforated hool of the pulsator. The centrifugal pump may include a second housing fixedly coupled to the first housing, an impeller embedded in the first housing for circulating the washing water to the injection nozzle or for flowing into the second fluid port. A stator embedded in the second housing and receiving an electric signal from a microcomputer, a rotor surrounded by the stator, and rotating in a predetermined time period as the electric signal is applied to the stator, and fixedly inserted into the center of the rotor A drive shaft that rotates together as the rotor rotates, and a first solenoid valve assembly for supplying air to the impeller, the first housing being connected to a first fluid port of the outer tub through a first fluid tube An inlet for accommodating the wash water and connected to the spray nozzle through a circulation tube A second duct connected to the second fluid port of the outer tub through a first duct and a second fluid pipe, and between the first duct and the second duct according to the discharge direction of the wash water of the wash water; And a two-way valve for selectively opening / closing the second duct, wherein the impeller is a suction port for sucking the wash water through the water inlet of the first housing, and the centrifugal force is applied to the sucked wash water. A first duct, or optionally, a plurality of second blades for transferring to the second duct, and a hub fixedly coupled to the drive shaft to receive rotational force, wherein a space is formed in the hub and the drive shaft The first end of the bearing holder is fixedly inserted into the hub of the impeller and the second end opposite to the first end of the bearing holder is inserted into the distal end of the second housing. It is rotatably inserted in a bearing, a screw hole is formed in the center of the bearing holder, a longitudinally penetrating fluid passage is formed in the drive shaft, and air is discharged from the first solenoid valve assembly at the first end of the fluid passage. An inflow air inlet is formed, and a second end opposite to the first end is formed with a recess in which a check valve is embedded, the fluid passage is tapered toward the first end of the fluid passage, and the first solenoid valve assembly is A casing having an opening for accommodating air in the atmosphere, a screw portion screwed to a screw hole of the bearing holder and having a valve chamber in communication with the fluid passage therein, and an intermittent blocking spool flowing into the valve chamber A valve, a hollow bobbin disposed in the casing, is wound around the outer circumference of the bobbin. A solenoid that is selected, disposed in the bobbin, a movable core reciprocating as the electric signal is intermittently applied to the solenoid, a support member for supporting the movable core, and disposed between the movable core and the support member, the movable core And a spring for elastically supporting the spring, and an actuating rod for intermittently pushing the spool valve so that air can be introduced into the valve chamber, the first end of the actuating rod being fixedly coupled to the movable core. A first gap is formed between the outer wall of the movable core and the inner wall of the hollow bobbin opposite the first end, and a second gap is formed between the inner wall of the support member and the outer wall of the actuating rod, thereby Since a second gap is formed between the outer walls, the air introduced through the opening of the casing causes the first and The duct is introduced into the valve chamber through a second gap, and the second duct of the first housing is connected to the washing water discharge pipe, and the discharge pipe is opened / closed according to an electric signal applied from the microcomputer at a predetermined point of the washing water discharge pipe. Washing machine, characterized in that the second solenoid valve assembly is provided.